With Helm, there is no need for Artifactory. You get Harbor, Verdaccio, etc. It is silly to pay a company 100k+ when all this stuff is easily managed using official or far more powerful tools.
Can I upload my Maven binaries to Helm? Does Helm store them? If I have a jar or war, can Helm store them? Does Helm resolve Maven dependencies if I connect to it and run mvn clean install locally?
"To err is human. To really foul things up requires a computer."
But that's assuming you use Kubernetes.
Helm is not a replacement for Artifactory, I don't know what you're going on about. They have a bit of overlap but the main use case of Artifactory is as a binary artifact repository for any environment, including non-Kubernetes ones. And there are a lot of non-Kubernetes environments out there. I'd argue that Kubernetes environments are a drop in the ocean compared to everything else.